Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3b8e86fd1a9ee8…

MALICIOUS

PDF

86.0 KB Created: 2021-07-13 05:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3e31376b242594631a0eef9c47875c8 SHA-1: 2c761ee46d0a0421f541517ed3dd653cf59fdf95 SHA-256: 8e3b8e86fd1a9ee85163e029fbe1b73f93d286cf372c2bc774b8aeba96b113ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://absolutelyneon.com/userfiles/file/kajororewalitamu.pdf
    • https://rkdestate.com/userfiles/file/jupimavamegalevoxokuraki.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/e93821be8f4251d933b0c8d00279e767/supuluzesi.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/ac8f50302a9480a182d217bd130d6250/mafawedalisozupovo.pdf
    • http://phuclocvienjsc.com/uploads/image/files/73790742032.pdf
    • http://pcwest1980.com/clients/9/9b/9b13e9c1eb96aaf026ead536bb80a376/File/kogepunezam.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/c381mahk6qg802v0030jj3s7v5/fanixotetusakitaginiwe.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607445e267caa---petekokolewikorebobora.pdf
    • http://winterwonderlandzundert.nl/uploadimages/files/55711856993.pdf
    • http://beloezoloto.ru/userfiles/file/zokidaxuxete.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efe67d2793---7452036004.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096713eeec17---47486313800.pdf
    • http://aldo-ins.com/userfiles/file/36638066759.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/8f417ddff4e90e19f88920d44d73d07b/xufixon.pdf
    • http://dansungsala.com/uploads/files/josaxo.pdf
    • http://movietek.vn/hinh-anh/files/10513312832.pdf
    • https://securityguardsupply.org/php/uploads/file/6680494940.pdf
    • http://jirehenl.com/userfiles/file/260138265816.pdf
    • http://alarcon-v.com/editor_upload_image/file/44645048497.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/b612ea9c89c705a6b818940e6dbc1473/zedozudiforuvipigutolilo.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f98158a712---zudemonunulama.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1e3ae104035556c2ef5cd02e4e021e44/tiripazafebugawinizije.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607221fa19247---43590867124.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=when+you+look+at+me+like+that+my+darling+what+did+you+expect
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000defb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 16792 bytes
font_01_sfnt_off0000f70d.bin
f2a7b8654b41077c8d67fbeca9241c9d7d63b2bb4c14a7ebb9985bb521a4dbb7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF70D 22188 bytes
font_02_sfnt_off00012e28.bin
61ec5c8e3bfa4fce89d65e36ef329eb5c39f4193d97455f9a2f7801c3564b86e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E28 11280 bytes